Study on the Absorption of Silymarin Enteric Coated-PLGA Nanoparticles in Rat in situ Intestine Perfu-sion Model and Caco-2 Cell Model / 中国药房

OBJECTIVE:To study the absorption features of Silymarin enteric coated-polyllactic-co-glycolic acid (PLGA) nanoparticles in rat in situ intestine perfusion model and colonic adenoma Caco-2 cell model. METHODS:HPLC method was used to determine the content of silymarin. The absorption rate constant(Ka)and apparent absorption coefficient(Kapp)of Silymarin sus-pension,Silymarin PLGA nanoparticles and Silymarin enteric coated-PLGA nanoparticles were investigated in duodenum,jejunum, ileum and colon of rat in situ intestine perfusion model;the apparent permeability coefficient (Papp) of those drugs containing low-concentration,medium-concentration and high-concentration(20,40,60 μg/mL)of silymarin in Caco-2 cell model were also investigated. RESULTS:Compared with Silymarin suspension,Ka and Kapp of Silymarin PLGA nanoparticles and Silymarin enteric coated-PLGA nanoparticles were all increased in duodenum,jejunum,ileum and colon(P0.05). CONCLUSIONS:Silymarin enteric coated-PLGA nanoparticles can effectively increase the intestinal ab-sorption,cellular uptake and transmembrane transport rate of silymarin.

Pharmacology studies of berberine on treatment of digestive diseases / 中国生化药物杂志

Literatures at home and abroad were collected and pharmacology studies of berberine on treatment of digestive diseases were summarized. Berberine has still huge potential for treatment of peptic ulcer, gastritis, enteritis and other applications, and it has promising prospect in development and utilization.